package de.klein5.TowerDefense.utils;

import java.lang.reflect.Field;
import java.util.List;
import java.util.Random;
import java.util.UUID;

import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.craftbukkit.v1_9_R2.entity.CraftEntity;
import org.bukkit.craftbukkit.v1_9_R2.entity.CraftPlayer;
import org.bukkit.entity.Entity;
import org.bukkit.entity.LivingEntity;
import org.bukkit.entity.Player;

import de.klein5.TowerDefense.datawatcher.EnumDataWatcherObjects;
import de.klein5.TowerDefense.datawatcher.NullDataWatcher;
import net.minecraft.server.v1_9_R2.DataWatcher;
import net.minecraft.server.v1_9_R2.Packet;
import net.minecraft.server.v1_9_R2.PacketPlayOutEntityDestroy;
import net.minecraft.server.v1_9_R2.PacketPlayOutEntityMetadata;
import net.minecraft.server.v1_9_R2.PacketPlayOutSpawnEntityLiving;

public class Laser {

	protected int entityId;
	protected NullDataWatcher dataWatcher;

	private Location location;

	private byte changeMask(byte bitMask, int bit, boolean state) {
		if (state) {
			return bitMask |= 1 << bit;
		} else {
			return bitMask &= ~(1 << bit);
		}
	}

	public Laser(Location location) {
		entityId = new Random().nextInt(Integer.MAX_VALUE);
		dataWatcher = new NullDataWatcher();
		byte status = 0;
		status = changeMask(status, 0, false); // FIRE
		status = changeMask(status, 1, false); // SNEAK
		status = changeMask(status, 2, false); // NOT_SET
		status = changeMask(status, 3, false); // SPRINT
		status = changeMask(status, 4, false); // USE_ITEM
		status = changeMask(status, 5, false); // INVISABLE
		dataWatcher.add(EnumDataWatcherObjects.LIVING_HEALTH_06, (float) 20F);
		dataWatcher.add(EnumDataWatcherObjects.LIVING_POITION_COLOR_07, 0);
		dataWatcher.add(EnumDataWatcherObjects.ENTITY_BITMASK_00, status);
		dataWatcher.add(EnumDataWatcherObjects.HUMAN_SKIN_12, (byte) 127);
		this.location = location;
	}

	private void sendPacket(Packet packet) {
		for (Player player : Bukkit.getOnlinePlayers()) {
			((CraftPlayer) player).getHandle().playerConnection.sendPacket(packet);
		}
	}

	private void spawn() {
		try {
			PacketPlayOutSpawnEntityLiving packet = new PacketPlayOutSpawnEntityLiving();
			set(packet, "a", entityId);
			set(packet, "b", UUID.randomUUID());
			set(packet, "c", org.bukkit.entity.EntityType.GUARDIAN.getTypeId());
			set(packet, "d", toFixedPointNumber(location.getX()));
			set(packet, "e", toFixedPointNumber(location.getY()));
			set(packet, "f", toFixedPointNumber(location.getZ()));
			set(packet, "g", (int) toPackedByte(location.getYaw()));
			set(packet, "h", (int) toPackedByte(location.getPitch()));
			set(packet, "i", (int) toPackedByte(location.getPitch()));
			set(packet, "j", (byte) 0);
			set(packet, "k", (byte) 0);
			set(packet, "l", (byte) 0);
			set(packet, "m", dataWatcher.toNMS());

			sendPacket(packet);

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public void setTarget(Entity en) {
		try {
			spawn();
			PacketPlayOutEntityMetadata packet = new PacketPlayOutEntityMetadata();
			set(packet, "a", entityId);
			set(packet, "b", dataWatcher.toNMS().c());
			sendPacket(packet);

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public void despawn(Player show) {
		PacketPlayOutEntityDestroy packet = new PacketPlayOutEntityDestroy(new int[] { entityId });
		sendPacket(packet);
	}

	protected int calcData(int data, int id, boolean flag) {
		if (flag) {
			return Integer.valueOf(data | 1 << id);
		} else {
			return Integer.valueOf(data & ~(1 << id));
		}
	}

	protected int calcType(int type, int id, boolean flag) {
		if (flag) {
			return Integer.valueOf(type | id);
		} else {
			return Integer.valueOf(type & ~id);
		}
	}

	protected byte toPackedByte(float f) {
		return (byte) ((int) (f * 256.0F / 360.0F));
	}

	protected int toFixedPointNumber(Double d) {
		return (int) (d * 32D);
	}

	protected void set(Object instance, String name, Object value) throws Exception {
		Field field = instance.getClass().getDeclaredField(name);
		field.setAccessible(true);
		field.set(instance, value);
	}
}